Fort Knox is a community in Hardin County, Kentucky, home to about 8,836 people across 20 square miles. Its ZIP code is 40121.
Mostly Fort Knox
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| Nearest major airport | Louisville Muhammad Ali International Airport (SDF)22 miles away |
|---|---|
| Nearest city of 250,000+ | Louisville/Jefferson County, KY25 miles away |
| Nearest city of 1 million+ | Chicago, IL287 miles away |
Straight-line distances from the center of Fort Knox; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Fort Knox had 7,742 residents in the 2020 census, down 37% since 2000.
It’s the 53rd largest of 553 towns in Kentucky by population.
Hardin County grew from 22,937 residents in 1900 to 110,702 in 2020.
Hardin County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 23°F. About 53.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Brandenburg, KY weather station (10 miles away).
36,716 jobs at 2,253 businesses in Hardin County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2022 (private employers; jobs counted where people work).
182 doctors and other health care providers list an office in Fort Knox.
Nearest hospitals
Providers with an office here
| Primary care doctors | 30 |
|---|---|
| Specialist doctors | 18 |
| Dentists | 25 |
| Nurse practitioners and physician assistants | 48 |
| Mental health providers | 41 |
| Physical and occupational therapists | 16 |
| Optometrists | 3 |
| Chiropractors | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (7 nearby)
Grocery stores (5 nearby)
Pharmacies (1 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Counts are within about 3 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Kentucky National Guard Youth ChalleNGe Academies. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Bluegrass Challenge AcademyFort Knox | 9–12 | 80 | Alternative Education | 1.9 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Scott Intermediate SchoolFort Knox | 5–6 | 237 | Nonsectarian | 0.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.